Table 1 Identification of compounds found in the dense layers by means of XRD and micro-Raman spectroscopy (X = compound is present)
From: Microstructure and long-term corrosion of archaeological iron alloy artefacts
Magnetite/Maghemite Fe3O4/γ-Fe2O3 | Goethite α-FeO(OH) | Lepidocrocite γ-FeO(OH) | Akaganeite β-FeO(OH,Cl) | Hematite α-Fe2O3 | Siderite FeCO3 | Ferrite Fe | Cementite Fe3C | |||
|---|---|---|---|---|---|---|---|---|---|---|
Object #1 | XRD (phase %) | 18.9 | 25.7 | 6 | 5.5 | / | 1.7 | 39.4 | / | |
Raman | X | X | X | X | / | X | X | / | / | |
Object #2 | XRD (phase %) | 21.6 | 34 | / | 21.2 | / | / | 19.7 | 3.5 | |
Raman | X | / | X | X | X | / | / | / | / | |
Object #3 | XRD (phase %) | 48.8 | 50.6 | / | / | / | / | 0.6 | / | |
Raman | X | / | X | X | X | / | / | / | / | |
Object #4 | XRD (phase %) | 19.4 | 51.9 | 1.9 | / | / | / | 26.8 | / | |
Raman | X | / | X | / | / | / | / | / | / | |